In most bacterial operons, such as the lac operon, which of the following dna segments is responsible for controlling whether the operon is off or on?

a. lacy gene.
b. promoter
c. operator
d. repressor

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called